Three-phase four-wire filter and wiring device thereof

Abstract

The utility model provides a three-phase four-wire filter and a wiring device thereof, through changing the traditional wiring mode and increasing the linear contact area, the working current range is enlarged, the electrical connection is tighter, and the working performance of the filter is further ensured, and the three-phase four-wire filter and the wiring device thereof belong to the technical field of filters. The device is characterized in that a plurality of interfaces are symmetrically formed in the left end and the right end of the shell, the insulating assemblies are arranged at the interfaces in a sleeving mode, wiring devices are further arranged at the interfaces, and the wiring devices penetrate through the insulating assemblies; the wiring device comprises a connecting plate, a first connecting end and a second connecting end; the first connecting end is located at the head end of the connecting plate, and the wiring device is connected with the outside through the first connecting end; and the second connecting end is positioned at the tail end of the connecting plate and is connected with a circuit in the shell.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter technical field, concretely relates to a three -phase four -wire filter and wiring device thereof. BACKGROUND

[0002] Power filter as the important device of inhibiting power line conducted interference, has extremely important role in the electromagnetic compatibility design of equipment or system, it not only can inhibit the transmission interference, but also has the remarkable effect to the inhibition of radiation emission on line, attenuates the noise that enters through power, protects equipment from interference, can also inhibit the conducted interference that equipment itself generates, prevents it from entering power, pollutes electromagnetic environment, harms other equipment.

[0003] Due to the problem of working environment, the existing filter termination mode makes the anti-interference ability of the filter be affected to a certain extent, the product performance cannot be better played, and the loosening of the wiring terminal in special environment can cause abnormality. UTILITY MODEL CONTENT

[0004] The utility model discloses a three -phase four -wire filter and wiring device thereof, change the traditional wiring mode, increase the contact area of linearity, thereby enlarge the current range that can work, also make the electrical connection more closely, further guarantee the working performance of filter.

[0005] In order to achieve the above object, the utility model provides a three -phase four -wire filter and wiring device thereof, including shell and insulating component, its characterized in that: the left and right two ends of shell are symmetrically opened with a plurality of interfaces, the insulating component is set in the interface, the interface is also provided with wiring device, the wiring device penetrates the insulating component;

[0006] The wiring device includes a connecting plate, a first connecting end and a second connecting end.

[0007] The first connecting end is located at the head end of the connecting plate, and the wiring device is connected with the outside through the first connecting end.

[0008] The second connecting end is located at the tail end of the connecting plate and is connected with the circuit in the shell.

[0009] Further, the tail end of the connecting plate penetrates the insulating component and extends into the shell, and the right end surface of the connecting plate is flush with the right end surface of the insulating component.

[0010] Further, the first connecting end includes a conductive sheet fixedly arranged at the head end of the connecting plate, and the conductive sheet is perpendicular to the connecting plate.

[0011] The right end surface of the conductive sheet is flush with the left end surface of the insulating component.

[0012] The left end of the conductive sheet is fixedly provided with a fastening plate.

[0013] Further, the conductive sheet is provided with a slot matched with the connecting plate, and the conductive sheet is fixedly arranged on the connecting plate through the slot.

[0014] The fastening plate and the head end of the connecting plate are provided with a threaded groove, and the fastening plate and the connecting plate are connected through bolts.

[0015] Further, the second connecting end includes a baffle, and the baffle is fixedly connected with the tail end of the connecting plate.

[0016] The left end surface of the baffle abuts against the right end surface of the insulating assembly, and the baffle and the connecting plate are connected through bolts.

[0017] Further, the baffle, the conductive sheet and the fastening plate are parallel to each other.

[0018] Further, the circuit includes an input end, an output end, a common mode suppression module and a differential mode suppression module.

[0019] The common mode suppression module is arranged in series between the input end and the output end.

[0020] The differential mode suppression module is arranged between the common mode suppression module and the output end, and the differential mode suppression module includes four differential mode inductors LD, which are respectively located on three phase lines and a neutral line N.

[0021] A first X capacitor group Cx1 is arranged between the input end and the common mode suppression module, and three capacitors of the first X capacitor group Cx1 are respectively connected between the three phase lines and the neutral line N.

[0022] A third X capacitor group Cx3 is arranged between the differential mode suppression module and the output end, and one capacitor of the third X capacitor group Cx3 is respectively connected between the three phase lines and the neutral line N.

[0023] A first Y capacitor Cy1 is arranged between the common mode suppression module and the differential mode suppression module, and the first Y capacitor Cy1 is connected between the phase line N and a ground line E.

[0024] A second Y capacitor Cy2 is arranged between the differential mode suppression module and the output end, and the second Y capacitor Cy2 is connected between the phase line N and the ground line E.

[0025] The utility model provides this three -phase four -wire filter wiring device has more stable and reliable structure setting, is more difficult to take place loose or damage in special environment, and the fixed structure is also more convenient to the scale production behind, the convenient temporary replacement damage structure and the quick plug replacement of power end wire,

[0026] By increasing the linear contact area, the working carrying current of the filter can be increased, and electromagnetic interference caused by excessive exposed length of the wiring can be avoided, further ensuring the performance of the filter.

[0027] The utility model will be described in detail below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the structure schematic diagram of the utility model.

[0029] Figure 2 It is the plan view of the utility model.

[0030] Figure 3 It is the structure schematic diagram of the insulating assembly.

[0031] Figure 4 It is the structure schematic diagram of the wiring device.

[0032] Figure 5 It is the structure schematic diagram of the connecting plate.

[0033] Figure 6 It is the assembly plan view of the connecting device and the insulating assembly.

[0034] Figure 7 It is the circuit principle diagram of the utility model.

[0035] Figure 8 It is the insertion loss data under the load impedance 50Ω standard provided.

[0036] Mark explanation: 1, shell, 2, interface, 3, insulating assembly, 4, wiring device, 5, connecting plate, 51, threaded groove, 6, first connecting end, 61, conductive sheet, 611, slot, 62, fastening plate, 7, second connecting end, 71, baffle, 8, circuit, 81, input end, 82, output end, 83, common mode suppression module, 84, differential mode suppression module. DETAILED DESCRIPTION

[0037] In order to further explain the technical means and effects taken by the utility model to achieve the predetermined purpose, the specific implementation, structural features and effects of the utility model will be described in detail as follows in combination with the drawings and examples.

[0038] With reference to the drawings and in terms of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0039] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlapped", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the present application.

[0040] The terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features; in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0041] Embodiment 1

[0042] The present embodiment provides a three-phase four-wire filter and a wiring device as shown in Figures 1-8 The three-phase four-wire filter and the wiring device include a shell 1 and an insulation assembly 3, a plurality of interfaces 2 are symmetrically provided at the left and right ends of the shell 1, the insulation assembly 3 is sleeved at the interfaces 2, and a wiring device 4 is further provided at the interfaces 2, and the wiring device 4 penetrates the insulation assembly 3;

[0043] The wiring device 4 is used for being connected with an input power supply or as an output of the filter, the interfaces 2 are used for mounting the insulation assembly 3 and the wiring device 4, and the insulation assembly 3 isolates the shell 1 of the filter and the wiring device 4;

[0044] The wiring device 4 is composed of three parts, including a connecting plate 5, a first connecting end 6 and a second connecting end 7, the connecting plate 5 is used as the main structure of the wiring device 4, and the first connecting end 6 and the second connecting end 7 are connected;

[0045] The first connecting end 6 is located at the head end of the connecting plate 5, and the wiring device 4 is connected with the outside through the first connecting end 6;

[0046] The second connecting end 7 is located at the tail end of the connecting plate 5 and is connected with a circuit in the shell 1.

[0047] Further, as shown in Fig. Figure 2 The tail end of the connecting plate 5 penetrates the insulating assembly 3 into the shell 1, that is, the connecting device 4 is entirely sleeved in the insulating assembly 3, and the right end surface of the connecting plate 5 is flush with the right end surface of the insulating assembly 3, that is, the position of the connecting plate 5 is just flush with the right end surface of the insulating assembly 3 after the installation is completed.

[0048] Further, as shown in Fig. Figure 4 The first connecting end 6 includes a conductive sheet 61 fixedly arranged at the head end of the connecting plate 5, and the conductive sheet 61 is perpendicular to the connecting plate 5; the right end surface of the conductive sheet 61 is flush with the left end surface of the insulating assembly 3;

[0049] The left end of the conductive sheet 61 is fixedly provided with a fastening plate 62, and the abutting position of the fastening plate 62 and the conductive sheet 61 is the connecting position of the external power line; the vertically arranged conductive sheet 61 ensures that the connecting position is a vertical plane, so as to improve the overall process of the device and further ensure the reliability of the connecting end; meanwhile, the fastening plate 62 is used to lock and fasten the left end of the entire connecting device 4.

[0050] Further, as shown in Fig. Figure 5 The conductive sheet 61 is fixedly arranged on the connecting plate 5 through the insertion slot 611 matched with the connecting plate 5;

[0051] The head end of the fastening plate 62 and the connecting plate 5 is provided with a threaded groove 51, and the fastening plate 62 and the connecting plate 5 are connected through bolts;

[0052] The insertion slot 611 enables the conductive sheet 61 to be sleeved on the connecting plate 5 and then welded and fixed, so that the left end surface of the conductive sheet 61 can be flush with the left end surface of the connecting plate 5, thereby providing a larger contact area for the power line; meanwhile, the threaded groove 51 is provided on the connecting plate 5, so that the fastening plate 62 can be directly locked with the connecting plate 5 through bolts.

[0053] Further, as shown in Fig. Figure 4 The second connecting end 7 includes a baffle 71 fixedly connected with the tail end of the connecting plate 5;

[0054] The left end surface of the baffle 71 abuts against the right end surface of the insulating assembly 3, the baffle 71 is connected with the connecting plate 5 through bolts, the baffle 71 serves as the rightmost blocking structure of the connecting device 4, and simultaneously cooperates with the fastening plate 62 to secondarily fasten the entire connecting device 4 at the rightmost end, so that the connecting device 4 can be more firmly clamped in the insulating assembly 3.

[0055] Further, the baffle 71, the conductive sheet 61 and the fastening plate 62 are parallel to each other, that is, the overall structure of the whole wiring device 4 is more stable and firm, after fastening at the left and right ends of the wiring device 4, the wiring device 4 will not be skewed and a gap will not be generated between the wiring device 4 and the insulation assembly 3, so as to ensure the safety and stability of the whole filter.

[0056] Further, as shown in Figure 7 The circuit 8 comprises an input end 81, an output end 82, a common mode suppression module 83 and a differential mode suppression module 84.

[0057] The common mode suppression module 83 is installed in series between the input end 81 and the output end 82, the three-phase lines L1, L2, L3 and the neutral line N are wound together on the same ferrite ring magnetic core to form a four-wire common mode inductor LC, the common mode inductor LC has common mode noise suppression; the common mode inductor LC offsets high-frequency noise in the same direction

[0058] The differential mode suppression module 84 is installed between the common mode suppression module 83 and the output end 82, the differential mode suppression module 84 comprises four differential mode inductors LD, the four differential mode inductors LD are respectively located on the three-phase lines and the neutral line N to form an independent differential mode structure, which can effectively increase the impedance of the line and effectively hinder the propagation of differential mode noise.

[0059] A first X capacitor group Cx1 is arranged between the input end 81 and the common mode suppression module 83, three capacitors of the first X capacitor group Cx1 are respectively connected between the three-phase lines and the neutral line N, the first X capacitor group Cx1 serves as a front differential mode filter of the whole circuit 8, which can effectively suppress common mode interference and high-frequency noise and avoid the negative effects of surges.

[0060] A second X capacitor group Cx2 is arranged between the common mode suppression module 83 and the differential mode suppression module 84, three capacitors of the second X capacitor group Cx2 are respectively connected between the three-phase lines and the neutral line N.

[0061] A third X capacitor group Cx3 is arranged between the differential mode suppression module 84 and the output end 82, one capacitor of the third X capacitor group Cx3 is respectively connected between the three-phase lines and the neutral line N.

[0062] A first Y capacitor Cy1 is arranged between the common mode suppression module 83 and the differential mode suppression module 84, the first Y capacitor Cy1 is connected between the phase line N and the ground line E; a second Y capacitor Cy2 is arranged between the differential mode suppression module 84 and the output end 82, the second Y capacitor Cy2 is connected between the phase line N and the ground line E; the first Y capacitor Cy1 and the second Y capacitor Cy2 guide the residual common mode noise to the ground, further improving the common mode anti-interference ability of the whole circuit, the first Y capacitor Cy1 and the second Y capacitor Cy2 are arranged at the left and right ends of the differential mode inductor LD respectively, and together form a П structure circuit, which can further suppress the harmonics in the circuit 8.

[0063] By inserting the inductance and capacitance structure in the circuit 8, the entire circuit 8 forms a multi-stage filter, and at the same time, the common mode inductance LC and the differential mode inductance LD are inserted, so that the filter can have better common mode interference and differential mode interference suppression ability, and the independent differential mode inductance LD can ensure that the filter has more stable working performance in harsh environment.

[0064] In use, first, the insulating assembly 3 is sleeved at the interface 2 of the shell 1, and the end face of the insulating assembly 3 with the groove is installed on the outside of the shell 1, such as Figure 3 , so as to cooperate with the wiring device 4 more, and then the tail end of the connecting plate 5 is inserted into the shell 1 through the insulating assembly 3, until the right end face of the conductive sheet 61 is on the insulating assembly 3, at this time, the right end face of the connecting plate 5 is just flush with the right end face of the insulating assembly 3;

[0065] Then, the baffle 71 is installed on the right end of the connecting plate 5 through the bolt, at this time, the connecting plate 5 is tightly worn on the insulating assembly 3 due to the action of the conductive sheet 61 and the baffle 71; Next, the fastening plate 62 is first worn on the connecting plate 5 through the bolt and leaves a gap, after the external power line is inserted into the gap, the bolt is tightened, and the installation of the entire wiring device 4 is completed;

[0066] Through the structural improvement of the termination device, the wiring device 4 is more stable and reliable, and is not easy to loosen, and the termination structure is also easy to damage, the structural design makes it possible to quickly replace, and the increase of the linear contact area also improves the carrying current of the filter, and the improved structure is more suitable for special environment.

[0067] The above is a further detailed description of the utility model in combination with the preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A three-phase four-wire filter and its wiring device, comprising a housing (1) and an insulation assembly (3), characterized in that: The left and right ends of the shell (1) are symmetrically provided with a plurality of interfaces (2), the insulation assembly (3) is sleeved on the interface (2), and a wiring device (4) is further arranged at the interface (2), and the wiring device (4) penetrates the insulation assembly (3); The wiring device (4) comprises a connecting plate (5), a first connecting end (6) and a second connecting end (7); The first connecting end (6) is located at the head end of the connecting plate (5), and the wiring device (4) is connected with the outside through the first connecting end (6); The second connecting end (7) is located at the tail end of the connecting plate (5) and is connected with the circuit (8) in the shell (1).

2. A three-phase four-wire filter and its connection device as claimed in claim 1, characterized in that: The tail end of the connecting plate (5) penetrates the insulation assembly (3) and extends into the shell (1), and the right end surface of the connecting plate (5) is flush with the right end surface of the insulation assembly (3).

3. A three-phase four-wire filter and its connection device as claimed in claim 1, characterized in that: The first connecting end (6) comprises a conductive sheet (61) fixedly arranged at the head end of the connecting plate (5), and the conductive sheet (61) is perpendicular to the connecting plate (5); The right end surface of the conductive sheet (61) is flush with the left end surface of the insulation assembly (3); The left end of the conductive sheet (61) is fixedly provided with a fastening plate (62).

4. A three-phase four-wire filter and its connection device as claimed in claim 3, characterized in that: A slot (611) matched with the connecting plate (5) is formed in the conductive sheet (61), and the conductive sheet (61) is fixedly arranged on the connecting plate (5) through the slot (611); The head end of the connecting plate (5) is provided with a threaded groove (51), and the fastening plate (62) is connected with the connecting plate (5) through bolts.

5. A three-phase four-wire filter and its connection device as claimed in claim 4, characterized in that: The second connecting end (7) comprises a baffle (71) fixedly connected with the tail end of the connecting plate (5); The left end surface of the baffle (71) abuts against the right end surface of the insulation assembly (3), and the baffle (71) is connected with the connecting plate (5) through bolts.

6. A three-phase four-wire filter and its connection device as claimed in claim 5, characterized in that: The baffle (71), the conductive sheet (61) and the fastening plate (62) are parallel to each other.

7. A three-phase four-wire filter and its connection device as claimed in claim 1, characterized in that: The circuit (8) comprises an input end (81), an output end (82), a common-mode rejection module (83) and a differential-mode rejection module (84); The common-mode rejection module (83) is connected in series between the input end (81) and the output end (82); The differential-mode rejection module (84) is arranged between the common-mode rejection module (83) and the output end (82), and comprises four differential-mode inductors LD, which are respectively connected to three phase lines and a neutral line N; A first X capacitor group Cx1 is arranged between the input end (81) and the common-mode rejection module (83), and three capacitors of the first X capacitor group Cx1 are respectively connected between three phase lines and a neutral line N; A second X capacitor group Cx2 is arranged between the common-mode rejection module (83) and the differential-mode rejection module (84), and three capacitors of the second X capacitor group Cx2 are respectively connected between three phase lines and a neutral line N; A third X capacitor group Cx3 is arranged between the differential mode suppression module (84) and the output end (82), and each capacitor of the third X capacitor group Cx3 is connected between three phase lines and a neutral line N; A first Y capacitor Cy1 is arranged between the common mode suppression module (83) and the differential mode suppression module (84), and the first Y capacitor Cy1 is connected between a phase line N and a ground line E; A second Y capacitor Cy2 is arranged between the differential mode suppression module (84) and the output end (82), and the second Y capacitor Cy2 is connected between the phase line N and the ground line E.

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